sensitivity_offset.m test_Sensitivity.m Sensitivity.m

Example code that produces array receiver output correlation matrices and steering vectors, determines optimal beamformer weights, and computes performance metrics (spillover efficiency, aperture efficiency, and sensitivity). The performance metrics are given as a function of array offset distance relative to the focal plane.

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reflector_response2.m

Physical optics reflector analysis code (2D numerical integration). Implements a closer approximation for a finite length dipole than reflector_response.m.

PDF testCode1 testCode2

Overlap_Matrix.m

This function computes the pattern overlap matrix for an antenna array. Image theory is used to include the effect of a ground plane, where the ground plane is assumed to be infinite. The function returns pattern overlap integrals over a full hemisphere, as well as overlap integrals over an annular region representing the spillover region of a reflector. The spillover overlap matrix can be used to obtain the spillover noise correlation matrix for the array as a feed for a reflector.

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array_element_response.m

Computes the total Eletric field for each of the array elementsas well as the B_matrix from Dr. Warnicks ECEn 665 notes. Also returns the signal covariance matrix.

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gq_legendre.m

Find weights and nodes of Gauss-Legendre quadrature, used in Overlap_Matrix.m code.

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cosint.m

Computes cosint function, used in Overlap_Matrix.m code.

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sinint.m

Computes sinint function, used in Overlap_Matrix.m code.

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reflector_response.m

Fast physical optics reflector analysis code with one dimensional numerical integration. This code is accurate for a Hertzian dipole and near-boresight elevation angles, but for a linear antenna requires that the azimuthal dependence of the element pattern be neglected. (Note: reflector_response.m has been changed so that the offset variable is in meters rather than wavelengths.) The test code includes conversions from transmitted fields to received voltages and a comparison to reflector_response2.m and TICRA results.

test code

array_overlap_hemi.m

This function computes the pattern overlap matrix for an antenna array. The element patterns are assumed to be hemispherical, approximating the effect of a backing ground plane. The function returns pattern overlap integrals over a full hemisphere, as well as overlap integrals over an annular region representing the spillover region of a reflector. The spillover overlap matrix can be used to obtain the spillover noise correlation matrix for the array as a feed for a reflector.

beamformer.m

Runs different beamformers on the data from the 19-element array test, including LCMV and Max-SINR. (Note: Requires complex_baseband.m, correlate.m, load_baseband_data.m, load_packed_data.m, load_packed_header.m, make_lpf_taps.m, and my_psd.m.)

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complex_baseband.m

Complex basebands unpacked data.

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correlate.m

Creates correlation matrix for complex baseband data.

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load_baseband_data.m

Loads packed data and complex basebands it. Mean removal is being done before complex basebanding and it is done on a block-by-block basis. (Note: Requires complex_baseband.m, load_packed_data.m, load_packed_header.m, and make_lpf_taps.m.)

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load_packed_data.m

Unpacks data as 16-bit floating point values. (Note: Use load_packed_header.m prior to using this.)

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load_packed_header.m

Extracts header information from packed file.

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make_lpf_taps.m

Creates LPF coefficients for the filter used for complex basebanding.

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mypsd.m

Computes PSD from complex baseband data.

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